they are fed f/t you are introducing it from above,they therefore relate YOU to food.
I have some feeding live some F/T and never had problem with either one, never had to work hard at it either with F/T, all my BP are aggressive feeders no matter what the prey is.
Now remember when feeding F/T you need to use tongs, and make sure the prey is warm enough so your BP get the heat signal from the prey and not your hand.
Bottom line it is all about knowing your options, be responsible and feed what work for your animal and is convenient for you.